What is a packet sniffer used for in network security?

• A. To block unauthorized access to networks
• B. To convert data into a coded format
• C. To capture and analyze network packets
• D. To educate employees about security threats

Answer: (C)

A packet sniffer is a tool that captures and analyzes network packets as they traverse a network. In the context of network security, this capability allows security professionals to monitor traffic for malicious activity, identify potential vulnerabilities, and troubleshoot network issues. By analyzing the data contained within these packets, security teams can detect anomalies, identify unauthorized access attempts, and ensure that sensitive information is being appropriately secured.

Capturing and analyzing network packets is crucial for understanding the current state of network traffic, evaluating security measures, and assessing the integrity and confidentiality of the data transmitted over the network. This process can help in recognizing patterns of behavior that may indicate a security threat, thus enabling proactive measures to be taken to mitigate risks.

The other options mentioned do not accurately reflect the primary function of a packet sniffer. Blocking unauthorized access pertains to firewalls or intrusion prevention systems, converting data into a coded format relates to encryption, and educating employees about security threats is focused on training rather than technical analysis.